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It was known that there are toxic substances in green algae that look like they have released green paint, but it was the first domestic investigation result that this toxin spreads into the air.

Microcystin, a poisonous substance in green algae, was detected in the air 1.2 km away from the Nakdong River.



First of all, this is KNN reporter Lee Tae-hoon.



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Environmental groups such as the Korea Federation for Environmental Movement and a research team from Pukyong National University and Kyungpook National University conducted a research study from the end of last month to the beginning of this month to see if there are algae toxins in the air around the Nakdong River.



Although there have been studies abroad, this is the first study in Korea.



1.88 nanograms of microcystine was detected in 1 m3 in the air on the roof of an apartment building 1.2 km from the Nakdong River.



This is 144 times more than the lowest concentrations detected in the atmosphere of rivers in New Hampshire, USA.



[Kang Mi-ae / Nakdonggang Network Executive Committee: This is a really shocking result.

The state has neglected this green algae for so long.]



6.8 nanograms were detected in 1㎥ in the air above the boat at the Nakdong River Daedong Wharf.



There were 523 times more cases than those detected in rivers in New Hampshire, USA.



Microcystine was detected in the atmosphere of 11 survey points around the Nakdong River.



In addition, 16.1 nanograms of BMAA, which causes brain disease, was measured in the atmosphere of a cruise ship dock on the Nakdong River.



Absorption of toxic substances through the atmosphere is faster because the mucous membrane in the nose is thinner and can be more deadly to the brain.



[Heeja Lim/Chairman of Nakdonggang Network Co-Executive Committee: It is more dangerous because it enters the nose and enters the blood vessels or the brain.]



This investigation period was not the peak period for algal blooms.



Cyanobacteria were also detected in the masks of members of environmental groups under investigation.



The research team used an investigation method that captures cyanobacteria floating in the air and identifies toxic substances in the cyanobacteria.



(Video coverage: Jung Sung-wook KNN · Jeon Jae-hyun KNN)



▶ 'Green Algae Toxin' has no human risk standards...

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